Disclosure to Promote the Right To Information

Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public.

इंटरनेट मानक

“!ान $ एक न' भारत का +नम-ण”Satyanarayan Gangaram Pitroda

“Invent a New India Using Knowledge”

“प0रा1 को छोड न' 5 तरफ”Jawaharlal Nehru

“Step Out From the Old to the New”

“जान1 का अ+धकार, जी1 का अ+धकार”Mazdoor Kisan Shakti Sangathan

“The Right to Information, The Right to Live”

“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता है”Bhartṛhari—Nītiśatakam

“Knowledge is such a treasure which cannot be stolen”

“Invent a New India Using Knowledge”

है”ह”ह

IS 4262 (2002): Sulphuric Acid - Code of Safety [CHD 8:Occupational Safety, Health and Chemical Hazards]

IS 4262:2002

August 2002

Indian Standard

SULPHURIC ACID — CODE OF SAFETY

(First Revision)

ICS 13.300,7.060.30

0 BIS 2002

BUREAU OF INDIAN STANDARDSMANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002

Price Group 4

I

Industrial Safety and Chemical Hazards Sectional Committee, CHD 8

FOREWORD

This Indian Standard (First Revision) was adopted by the Bureau of Indian Standards, after the draft finalizedby the Industrial Safety and Chemical Hazards Sectional Committee had been approved by the Chemical DivisionCouncil.

Sulphuric acid is an important industrial chemical principally used in the manufacture of fertilizers, chemicals,explosives, textiles, rayon and petroleum refining. It is unfortunate that coupled with the important and largevolume use of sulphuric acid, it is also one of the most corrosive and hazardous chemicals. Handling of sulphuricacid, therefore, presents various hazards which we better prevented than cured. Working according to a soundcode of practice will reduce the tiequency of hazards and also, in many cases, the amount of damage caused byan accident.

Sulphuric acid which has free sulphur trioxide dissolved in it is known as ‘oleum’ and ‘fhming sulphuric acid’since it fimes copiously in contact with air.

This standard was originally published in 1967. With a view to update the standard based on the experience oflast three decades and on the currently available data The Committee felt a need to revise the standard. In thisrevision general properties have been incorporated and modifications have been made to update toxicologicaldata, health hazard, storage and preventive measures based on the currently available data and last three decadesexperience.

There is no ISO standard on this subject. In preparation of this code, assistance has been derived from thefollowing publications:

a) NIOSH/OSHA (1978) ‘Occupational Health Guideline for Sulphuric Acid’, National Institute ofOccupational Safety and Health, Cincinati, Ohio, USA.

b) Alsksieva, Z (1991), Sulphuric Acid, Encyclopedia of Occupational Health and Safety. Volume 2International Labour Office, Geneva.

c) ACGIH (1991-1992), Threshold Limit Value for Chemical Substances and Physical Agents andBiological Exposure Indices, American Conference of Industrial Hygienists, 6500 Glenway Avenue,Building D-7, Cincinati, Ohio, USA.

d) State Factories Rules for Corrosive Substances and Chemical Works, made under Section 87 of theIndian Factories Aci, 1948.

e) A confined spaces checklist, ‘Occupational Health and Safety’, July 1997, P.39.

f) Encyclopedia of Chemical Technology — Ulman, 6th Edition.

The composition of the Committee responsible for the formulation of this standard is given at Annex A.

IS 4262:2002

IndianStandard

SULPHURIC ACID — CODE OF SAFETY

(First Revision)

1 SCOPE

1.1 This standard prescribes a code of safetyconcerning hazards relating to sulphuric acid. Itdescribes the properties and essential information forsafe handling and use of sulphuric acid.

1.1.1 This standard does not, however, deal with anyspecification for the design of building, chemicalengineering plant, and equipment for waste disposal.General precautionary measures in these respectsshould be taken.

2 REFERENCES

The Indian Standards listed below contain provisionswhich through reference in this text, constituteprovisions of this standard. At the time of publication,the editions indicated were valid. All standards aresubject to revision, and parties to agreements basedon this standard are encouraged to investigate thepossibility of applying the most recent editions of thestandards indicated below:

IS No. Title1260 (Part 1) : Pictorial marking for handling and1973 labelling of goods: Part 1Dangerous

goods (jirst revison)4155:1966 Glossary of terms relating to

chemical and radiation hazards andhazardous chemicals

3 TERMINOLOGY

For the purpose of this standard, definition of termsgiven in IS 4155 shall apply.

4 PROPERTIES OF SULPHURIC ACID

4.1 General Properties

a) Common name : Oil of vitriol, batteryacid, chamber acid,spent sulphuric acid

b) Chemical name : Sulphuric acid

c) Molecular formula : H2SOd

d) Molecular weight : 98.1

e) CAS No : ‘7664-93-9

t) U N number : 1830

g) Hazchem code : 2P

4.2 Physical Properties

a) Physical state : Liquid

b) Colour : Colorless, clear tocloudy

C) Odour : None (oleumhas a shmppenetrating odour)

d) Flammability : Non-flammable

e) Hygroscopicity : Very hydroscopic

t) Density : 1.834(99 percent acid)at 20”C

g) Freezing point : 10.5OC

h) Boiling point : 279.6°C

(98 percent acid)

j) Vapour pressure : Less than 0.001 mm Hg

at 20°C

k) Volubility : Miscible with waterand ethyl alcohol in allproportions

4.3 Chemical and Hazardous Properties

4.3.1 Reactivity

The acid in concentrated form is a strong oxidizingand sulphonating agent. It destroys organic matter withevolution of heat and toxic sulphur dioxide and carbonmonoxide; and attacks many metals with evolution offlammable hydrogen gas. Contact with such productsas nitrates, carbides, chlorates fulminates, picrates,etc, may cause fwe or explosion. Dilution with waterevolves considerable heat. It also attack some formsof plastics, rubber and coatings.

4.3.2 Corrosivity

Highly corrosive to most metals, particularly atconcentrations below 93 percent, with evolution ofhydrogen gas.

5 HAZARDS ASSOCIATED WITH SULPHURICACID

5.1 Health Hazards

These are of two types, namely, hazards having localeffects on the skin and eyes and hazards havingsystemic effects,

1

IS 4262:2002

5.1.1 Local Effects

Sulphuric acid is rapidly destructive to any tissue ofthe body with which it comes in contact, causing severeburns, due to its dehydrating actions which may beaccompanied by shock and collapse. Contact with eyesvery rapidly causes severe damage which may befollowed by total loss of sight. The diluted form ofacid acts as milder irritant due to acid properties.Repeated contact with dilute solutions may causedermatitis. Swallowing of the acid may cause severeinjury or death. The acid mist severely irritates theeyes, respiratory tracts, and skin.

5.1.2 Systemic Effects

Inhalation of concentrated vapour from hot acid oroleum may cause rapid loss of consciousness withserious damage to lung tissues. Individual sensitivityto such vapour is variable, 0.125 to 0.5 ppm may bemildly annoying, 1.5 to 2.5 ppm definitely unpleasantand 10 to 20 ppm are unbearable. Repeated exposureto sulphuric acid mist causes chromic conjunctivitis,tracheobronchities, stomatitis and dermatitis. Severeexposures may cause pneumonitis. Erosion of the teethalso occurs, particularly to those accustomed to mouthbreathing.

5.1.3 Occupational Exposure Limit

5.1.3.1 TLV – 1 mg/m3

5.1.3.2 The concentration of acid in breathing zoneof workers should not exceed the threshold limit valuefor exposure to sulphuric acid mist or vapour whenthe concentration is worked out as time weightedaverage for the work day. The short term excursionsin exposure levels may be allowed up to 3 mg/m3 fornot more than a total of 30 min during a work dayprovided that the time weighted average level doesnot exceed 1 mg/m3.

5.1.4 Toxicological Data

5.1.4.1 LC~O(Lethal Concentration –50) with 1micrometre particle size, eight hours exposure.

a) for adult guineapigs — 50 mg/m3

b) for young animals — 18 mg/m3

5.1.4.2 Continuous exposure of guineapigs to 2 mg/m3for 5 days caused pulmonary oedema and thickeningof alveolar walls.

5.1.4.3 Exposure of guineapigs to 2 mg/m3 for 1 hcaused an increase in pulmonary airways resistancefrom reflex bronchioconstruction.

5.2 Fire and Explosion Hazards

The acid is non-flammable but in higher concentrationmay cause Ignition by contact with organic or

combustible materials and such products as nitrates,carbides, chlorates and metallic powders. There islikelihood of highly flammable hydrogen gas beinggenerated inside a drum, tank car or a metal storagetank containing sulphuric acid. In as much ashydrogen gas will form explosive mixtures with airunder certain conditions, smoking or open lightsshould not be permitted near the open drums or tankcars. The acid, in contact with metallic sulphides, maycause evolution of hydrogen sulphide which may formflammable and toxic mixture with air, (inhalation ofhydrogen sulphide may lead to sudden death).

6 STORAGE AND HANDLING

6.1 Sulphuric acid is highly corrosive to most metals.For concentration from 93 to 99 percent, it may bestored satisfactorily in mild steel tanks, drums andglass carboys. For concentration below 93 percent, itshall be stored in glass carboys, earthenware jars orother suitable containers lined with acid-resistantmaterials. Storage should be located in the open or inwell ventilated buildings or sheds. Natural ventilationis sufficient. Sulphuric acid stored in any type ofmetallic container would evolve hydrogen which ishighly flammable and explosive. Pressure inside thecontainer may build upon this account. Such pressureshould be relieved frequently by opening plugs of themetallic containers or alternatively such containersshould be provided with safety vents.

6.2 Even small quantities of sulphuric acid should bestored away from other chemicals, specially organicmaterials, nitrates, cyanides and sulphides, chlorates,carbides, metal powders, oxidizing chemicals,peroxides and explosives.

6.3 Containers of sulphuric acid should be inspectedregularly for leaks. Damaged containers should behandled with special care.

6.4 Electrical wiring should be made of acid-resistantinsulation and encased in rigid metal or PVC conduits.Smoking shall be strictly prohibited where sulphuricacid is stored.

6.5 Each storage tank should be provided with a ventof suftlcient size. The vent should be of a type whichwill maintain the tank at atmospheric pressure andwhich is capable of being cleaned easily. The ventshould be fitted with a column made of acid resistanttransparent material packed with granules of selfindicating silica-gel with adequate moisture holdingcapacity. The spent silica gel should be replaced byregenerated one as soon as colour change is noted.Alternatively, a device to scrub the entering air byconcentrated sulphuric acid may be provided. Forinspection, the top of the tank should be accessible byan independent metallic ladder without the use of the

2

top of the tank which is likely to be corroded due toaction of acid mist.

6.6 All tanks should be placed squarely on goodfoundation and raised off the ground by at least twolayers of acid-proof bricks. The tanks should bemounted with a slight slope towards the sludge holeor outlet valve. A plug operated from the top of thetank should be provided over the outlet valve. Gaugeglasses in acid tanks should be avoided.

6.7 The tank should be surrounded by a bund wallhaving adequate capacity to hold the complete contentof the tank. If a common bund wall is made for morethan one tanks, then capacity of the bund should beenough to hold the content of the largest tank (afterdeducting the space occupied by the other tanks). Thebund wall and the floor of the bunded area should bemade of acid resistant material, The slope of the floorshould end up in a slump having drainpipe with valveapproachable from outside. The drain should dischargeinto a acid resistant neutralization sump of adequatesize. The height of the bund wall and its distance fromthe tank periphery should be so adjusted that the jet ofacid released fi?m any part of the body of the tankmay not fall outside the brim of the bund wall.

6.8 Drums should be stored with the plugs up. Storageperiod of acid in drums qhould be kept to a minimum.They should be vented once a week or earlier in hotweather to release hydrogen build-up.

6.9 Glass carboys used for storage of sulphuric acidshould be of sound construction and be kept in strongindividual wooden crates. The carboys should not becarried on should~rs. Suitable devices like tippler,siphon pump, etc, should be used for removingcontents.

6.10 Glass carboys should be stored on a bed oflimestone dust or calcareous sand.

6.11 Glass carboys containing acid should not be storedmore than two high. After their contents have beenremoved no attempt should be made to wash thecarboys with water. They should be drained off ascompletely as possible and used either to refill withthe same acid or returned to the supplier.

6.12 The flanges on the acid pipelines should be socovered that any leakage may not cause spray of acid.If the flanges are above working and walking surfaces,catchpots with adequate drain pipes may be providedto avoid dripping of acid on the body.

6.13 Floors of the storage area should be of acid-resistant material and should have adequate slope foreasy draining of any spilled acid. Before the acid isallowed to enter the main sewer, it should be collectedin a catchpit, sufficiently diluted and suitably

IS 4262:2002

neutralized. Water should be freely available to dilutesuch spillage.

7 PACKING AND LABELLING

7.1 Packing

7.1.1 Sulphuric acid is classified as a corrosive liquid.As such, it shall be packed in specified container.

7.1.2 Mild steel barrels or lorry tankers maybe safelyused for transport of acid having a specific gravityhigher than 1.8354 or 66°Be.

7.2 Labelling

7.2.1 Each container shall carry an identi~ing labelor stencil depicting the symbol given in Fig. 7 ofIS 1260 (Part 1) and containing the followinginformation:

SULPHURIC ACID (OR OLEUM)

DANGER ! CAUSES SEVERE BURNS

> Avoid breathing vapour (Oleum).

> Do not get in eyes, on skin, or clothing. Incase of contact, flush affected part withwater for at least 15 minutes..

> Do not add water to contents. Do not storewith oxidizing agents, organic materials,alkalies, explosives and metallic powders.Reacts with metal and gives off hydrogenwhich is flammable and explosive. Washoff any spillage of the acid with liberalquantities of water.

7.2.2 For labelling and posting the tank cars carryingsulphuric acid, the provisions for transport ofdangerous materials under Zndian Motor Vehicle Actand Rules, 1989 and as amendedmay be followed.

8 PREVENTIVE MEASURES

8.1 Handling of sulphuric acidhazards, which may be avoided

from time to time

presents variousby observing the

principal precautions set forth below:

a)

b)

c)

d)

3

Avoid contact of su!phuric acid with eyes,skin and clothing.

Wear rubber gloves, goggles, acid-proofaprons and boots while handling sulphuricacid or oleum.

Never add water or caustic solution tosulphuric acid. While diluting always addacid to water with constant stirring.

In the event of accidental contact, washaffected areas with plenty of water for at least15 minutes. Irrespective of the degree ofseriousness of an accident, fkst-aid or

IS 4262:2002

medical attention, or both, should be renderedat the earliest opportunity.

e) In case of spillage of sulphuric acid, it shouldbe first washed down with large quantities ofwater. Mild alkaline solution may be usedafterwards to neutralize the last traces of theacid.

f) The operations evolving sttlphuric acidvapour/mist should be enclosed as far aspossible and minimum required openingsshould be maintained with the adequate facevelocities with the help of local exhaustarrangement.

8.2 Spills and Leakages

Spilled acid should not be left unattended. Wash withwater or cover with dry sand, ash or gravel, if the useof water is impossible. Remaining traces of acid shouldbe neutralized with soda ash or lime. Do not mop upthe acid with cloth or rags. The sand or ash absorbedwith acid should be disposed off in secured sanitaryland fill. Diluted acid may be neutralized beforedisposing off in sewerage or water.

8.3 Personal Protection

Personal protection scheme depends upon theeffectiveness of employees education, training andsupervision. Personal protective equipment andpreplacement physical examinations are precautionarymeasures to avoid accidents and not a substitute forsafe working on the part of the personnel. Prior toassignment of processes involving the handling ofsulphuric acid, all individuals should have a carefulpreplacement physical examination.

8.3.1 Personal Protective Equipment

8.3.1.1 Employees handling sulphuric acid should beprovided with the following equipment

a) Safety helmets, ~bber gloves, rubber hightop safety boots and rubber aprons, A rubberacid suit is recommended for tank wagonloading or unloading. The tr~user should’notbe inserted into the high top safety boots (gumbootslknee boots). Instead, the openings ingum boots should be covered by spreadingtrousers round the gum boots.

b) Suitable gas-tight chemical safety goggles.

c) Approved masks and breathing apparatus forrespiratory protective as given in Table 1.

8.3.1.2 Adequate personal protective equipment shallbe available for emergency use throughout the plantor in an area where sulphuric acid is stored or used.Personnel should be trained to appreciate the processhazards, and the emergency and routine use of personal

Table 1 Selection of Respiratory Protection

[Clause 8.3.1(c)]

St Concentration Minimum ProtectionNo. (mg/m’)(1) (2) (3)

i) 1-50 Gas mask with fidl facepiece withacid gas canister and high efficiencyparticulate filter

ii) 51-100 Ak respirator with full facepiec?eoperated in.pressurE demand or otherpositive pressure mode.

iii) above 100 or Self contained breathing apparatusescape from with a till facepiece operated inunknown pressure demand mode or otherconcentrated or positive pressure mode.tire tlghting

equipment, Personal protective equipment should befrequently examined and maintained in goodcondition. Eye fountains, emergency showers, anddrench tubs covered with a thin sheet of polyethyleneto keep the water clean, should be located in all areaswhere there is danger of acid splashing.

9 FIRST-AID

9.1 Speed in removing sulphuric acid is of primaryimportance. First-aid should be given in all cases ofcontact with sulphuric acid in any form, as delay ininitiating treatment may result in serious injury.

9.2 General First-Aid

9.2.1 Apply copious quantity of running water. Thisis best provided for by situating readily accessible,well-marked, frequently-inspected, rapid-action safetyshowers. If the acid penetrates through the clothing,remove the clothing immediately and flush the skinwith water.

9.2.2 Do not neutralize the acid with alkali. The heatof neutralization actually accentuates the burn.

9.2.3 In case of excessive bums, the patient maycollapse or show shock symptoms, such as rapid pulseand sweating. Keep the patient in supine position(lying down on his back) and call the nearest physician.

9.2.4 No oil or ointment should be applied to affectedareas without specific orders from the physician.

9.3 Contact with Eyes

The following precautions should be observed even ifminute quantities of strong or dilute solutions ofsulphuric acid enter the eyes:

a) Immediately irrigate with copious quantityof running water for at least 15 minutes. Aspecial eye-washing fountain, a ready sourceof running tap water or a hose with a softgentle flow of drinking water should beavailable for eye irrigation.

4

,.,$$”

9 &

b) The eyelid should be held apart during theirrigation to ensure contact with eye tissues.

c) A physician preferably an eye specialistshould be called in without delay.

d) If pain is still present, the eye irrigationshould be continued for a second period of15 min. After the first phase of eye washing,instill 2 or 3 drops of 0.5-percent solution ofpontocaine or any equally effective aqueoustopical anesthetic.

e) No oil or oily ointment should be appliedunless ordered by the physician.

9.4 Ingestion

Ingestion of even dilute solutions of the acid causessevere bums of the mucuous membrane of the mouth,throat and stomach. Observe the following:

a) Do not attempt to induce vomiting.

b) Do not give anything oral to an unconsciouspatient.

c) If the patient is conscious, encourage him towash out his mouth with water and give himmilk with white of eggs to drink.

d) If these are not immediately available, giveas much water as possible for drinking.

e) Call a physician as soon as possible.

9.5 Inhalation

A worker exposed to sulphuric acid mist or oleumvapour should be at once removed to anuncontaminated area and a physician called at once.Oxygen may be administered but by an authorizedperson only.

9.5.1 If breathing has apparently ceased, artificialrespiration should be started immediately.

10 PROTECTION OF MAINTENANCE CREW

10.1 The hazardous nature of tank inspection, cleaningor repair requires that the maintenance crew becarefully trained for the purpose. All tank work shouldbe done under the direct supervision of a foreman.The following precautions are recommended.

10.1.1 Pipelines in or out of the tank or other apparatus

M 4262:2002

should be shut off or disconnected preferably byremoving a complete small section and a blank flangeshould be installed on the open end to protect againsthuman error and unsuspected leak.

10.1.2 Before entering a tank, it should be testedwhether further washing is necessary, and that noharmtil gas or vapour is present.

10.1.3 Proper personal protective equipment shouldbe worn by any one entering a tank for inspection,cleaning or repairs.

10.1.4 The tools used for working inside plants shouldbe of non-sparking type.

10.1.5 A safety belt and life line for a man enteringthe storage tank should be provided. A man on theoutside of the tank should keep the men in the tankunder constant observation and at least two other menshould be available to help those in the tank in case oftrouble. Entry into the tank and working on acidpipelines may be allowed only with permit to worksystem. If outside person has to enter the tank to rescuethe affected person inside the tank, the self-containedbreathing apparatus with full facepiece and pressuredemand or other positive pressure mode should beworn.

11 DISPOSAL OF USED CONTAINERS ANDWASTE MATERIAL

11.1 Disposal of Empty Containers

11.1.1 Before returning, completely drain the contentsand tightly close all openings.

11.1.2 Do not use sulphuric acid containers for anyother liquid, especially in case of drums.

11.1.3 Drums should be emptied by gravity only withthe use of a faucet or safety siphon fabricated from thematerial resistant to sulphuric acid. Application ofpressure to the drum for this purpose is extreme] ydangerous and should never be attempted.

11.2 Disposal of Waste

Sul#huric acid waste should be diluted and neutralizedbefore discharge into sewers. Limestone or soda ashmay be used as neutralizing agents.

. 5

..,.’,

.A*~

IS 4262 ; 2002

ANNEX A

(Foreword)

COMMITTEE COMPOSITION

Industrial Safety and Chemical Hazards Sectional Committee, CHD 8

Organization

National Ssfety council, Mumbai

AirportsAuthority of India New Delhi

AtomicEnergyReguhrtory~ Mumbrd

13babhaAtomicResearchCcntre, Mrrmbai

Central BoilcrBorrrdjNew Delhi

CerrIrfdLcatherRescarcb Ir@tute, Chermsi

CentxalMining Resesrcb Instihrtq Jharkhmd

Central WsrehousirtgCorporsdorLNew Delhi

Century Rsyon, Thsne

Confederationof IndianIndustries,New Delhi

Dcpsrtmeot of Explosives,Nagpur

Departmentof IndustrialPolicy& PromotiorrjNew Delhi

DevelopmentCommtiloner(SSt), New Delhi

Dkcctoratc GenerrdFactoryAdvice ServicesandLabourInstitutes,Mumbai

Dhectomte General of fieaith services, New Delhi

DifCCtOrStGGeneralofMhcs Safety,Dhanbad

Dkectorate of Industrial Safety and Health(Fsctory hrspcctorstc),Mumbai

EmployeesState InsuranceCqromtion,New Dclbi

Excel IndustriesLmit@ Mumbai

HhdustarrAeronauticsLnitc4 Bangsloru

Hhdustan Lever Lmite& Mumbrd

IndianChemicalManufbctmers-IstiorL Mrrmbai

Indian Drugsand PharrnaccuticalsLimited Risbiicsh

IndianInstituteofChemical Technology,Hyderabad

IndianPe&ochemicalCorporationLimitcdjVadodara

Indian Spaw Researchorganiio~ .%harikota

IndustrialToxicologyResearchCame, Luclmow

Mhristryof Defencc(DGQA),New Delhi

Mhisby ofDcfence, Dkectorste of Stsndarddo~ New Delhi

Minisuy of Dcferrce(OFB), Kolkata

Representative(s)

StrRIK. C. GUPTA(Chairman)

kllESMATIVS

Smu P.K.ChrosM

DRB.N. RAmn

&REJFSWATIVE

~AIIVE

SruuJ. K. Pmmsv

~ATIW

SHRIH.G. UmAMCHANOANISmrrS. K. Mr- (Alternate)

RERESWTAllVS

%luKINTATIVS

DRD.R CHAWLA

kRESQ/TATIVE

DRA.K. MNUMOARSIiRls. P. RANA(Alternate)

~ATIVS

DmcroR OFMINESSAFETY(MSE)DSFUTVDuuzcroROFkh-msSAFETYHQ (Afternde)

RETOSDWATIVE

RWRBSNTAIIVE

RFPMSFNATIVE

kWSNTATIVE

SHRIB. B.DAVSSmrAom’AJrrAvm(Ahwnate)

SmrrV.N.DASSmuA.A. PANJWm.n(Alternate)

RIPREWWATIVS

Srnu s. VSNXATESWASA RAo

%Rlp. vLIAVRMiAVANSHIUM. R. PATSL(Afternate I)SW A.V. SARATHV(Alternate II)

SHIUP.N.SANXASANSrmrV.K.SRIVASTAVA(Alternate)

DRvlRshDsAMrsRADRV.P.SHASMA(Alternate)

SHRIM. S. hJLTANMSHRISumrGHosH(Alternate)

.%llUp..%AHWALTCoLTrmNOERSrNoH(Ahwrrare)

DRD.S. S.hNOULY

,1,.,’

SHRIR. SmmVASAN(Alternate)

6

(Continuedfiom page 6)

Ministryof Defence (R & D), Kanpur

Mhristryof Environment & ForestjNew Delhi

National Institute ofGccupationrd Health,Ahmedabad

National Grganic Chemical Industries Llmitcd,Thane

National Safety Council, Mumbai

011Industry Safety Directorate, New Delhi

Safety Appliamxs Manufacturers’Association,Mumbai

SIEL Chemical Complex, New Delhi

Southern PetrochemicalIndustriesCorporationLimited,Tuticorin

StandingFireAdvisory Council,New Delhi

Steel Authority of India Limited, Ranchi

Tata AIG Rkk Management ServicesLimited, Mumbai

BIS Directorate General

Representative(s)

DRA. K. SAXENADRIhrrmRA SLNGH(Alternate)

RHWSENTATIVS

RFPRBRWATIVE

DRB.V.BAPATSHRIV. R.NARLA(Alternate)

SHRIP.M. RAOSSUUD. BISWAS(Alternate)

SHRIS.K.CIWGWMnSmuV.K. SRNASTAVA(Alternate)

SHRIV.JAYARAMANSsuuS.MIJRUGANANOAM(Alternate)

RWRMEtWATNE

SmuUrwTSHD.SHAH

SmuS.K.CHAuommuDkector & Head (CHD)[RepresentingDirectorGeneral (Ec-oficio)]

Member-SecretarySmu N. K. PAL

Director(CHD), BIS

7

:. ~,—

Bureau of Indian Standards

01S is a statutory institution established under the Bureau of Zndian Standards Act, 1986 to promoteharmonious development of the activities of standardization, marking and quality certification of goodsand attending to connected matters in the country.

Copyright

BIS has the copyright of all its publications. No part of these publications may be reproduced in any formwithout the prior permission in writing of BIS. This does not preclude the free use, in the course ofimplementing the standard, of necessary details, such as symbols and sizes, type or grade designations.Enquiries relating to copyright be addressed to the Director (Publications), BIS.

Review of Indian Standards

Amendments are issued to standards as the need arises on the basis of comments. Standards are also reviewedperiodically; a standard along with amendments is reaffirmed when such review indicates that no changes areneeded; if the review indicates that changes are needed, it is taken up for revision. Users of Indian Standardsshould ascertain that they are in possession of the latest amendments or edition by referring to the latest issue of‘BIS Catalogue’ and ‘Standards: Monthly Additions’.

This Indian Standard has been developed fkom Doc : No. CHD 8 (1024).

Amendments Issued Since Publication

Amend No. Date of Issue Text Affected

BUREAU OF INDIAN STANDARDS

Headquarters :

Manak Bhavan, 9 Bahadur Shah Zafar Marg, New Delhi 110002 Telegrams : ManaksansthaTelephones :3230131,3233375,323 9402 (Common to all otlices)

Regional Offices : Telephone

Central :

Eastern :

Northern :

Southern :

Western :

Branches :

Manak Bhavan, 9 Bahadur Shah Zafar Marg

{

3237617NEW DEL~I 110002 3233841 I

1/14 C.I.T. Scheme VII M, V. I. P. Road, Kankurgachi

{

3378499,3378561KOLKATA 700054 3378626,3379120

SCO 335-336, Sector 34-A, CHANDIGARH 160022

{

603843602025

C.I.T. Campus, IV Cross Road, CHENNAI 600113.,,

{

2541216,2541442,.,’

2542519,2541315

Manakalaya, E9 MIDC, Marol, Andheri (East)

{

8329295,8327858MUMBAI 400093 8327891, 8327892

AHh&EDABAD.BANGALORE. BHOPAL. BHUBANESHWAR. COIMBATORE. FARIDABAD.GHAZIABAD. GUWAHATI. HYDERABAD. JAIPUR. KANPUR. LUCKNOW. NAGPUR.NALAGARH. PATNA, PUNE., RAJKOT. THIRUVANANTHAPURAM. VISAKHAPATNAM

Rcprogmphy Unit, BIS, New Delhi, India

I